1.Take a pan pour some oil and heat it,add cumin,mustard seeds,onions,green chillies,turmeric powder,salt,garam masala powder,red chilli powder and mix well,fry for few minutes.2.Add sweet potatoes and stir fry for few minutes.Add brinjal and give it a stir.3.Cover and cook for few minutes till tender,add some water as required and cook for another few minutes.4.Finally add coconut milk and mix it well,transfer into a bowl and garnish with coriander leaves.Serve hot.